<template>
	<el-container class="home-container">
		<!--头部区域-->
		<el-header>
			<div>
				<img src="../assets/heima.png" alt="">
				<span>电商管理系统</span>
			</div>
			<el-button type="info" @click="logout">退出</el-button>
		</el-header>
		<!--页面主体区域-->
		<el-container>
			<!---侧边栏-->
			<el-aside :width="isCollapse ? '64px' : '200px'">
				<div class="toggle-button" @click="toggleCollapse">|||</div>
				<!--侧边栏菜单区域-->
				<el-menu background-color="#333744" text-color="#fff" 
				active-text-color="#409EFF" unique-opened :collapse="isCollapse"
				:collapse-transition="false" router :default-active="activePath">
					<!-- 一级菜单 -->
					<el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
						<!-- 一级菜单模板区域 -->
						<template slot="title">
							<!-- 图标 -->
							<i :class="iconsObj[item.id]"></i>
							<!-- 文本 -->
							<span>{{item.authName}}</span>
						</template>

						<!-- 二级菜单 -->
						<el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" 
						:key="subItem.id" @click="saveNavState('/' + subItem.path)">
							<!-- 一级菜单模板区域 -->
							<template slot="title">
								<!-- 图标 -->
								<i class="el-icon-menu"></i>
								<!-- 文本 -->
								<span>{{subItem.authName}}</span>
							</template>
						</el-menu-item>
					</el-submenu>
				</el-menu>
			</el-aside>
			<!--右侧内容主体-->
			<el-main>
				<!-- 路由占位符 -->
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
	export default {
		data() {
			return {
				//左侧菜单数据
				menulist: [],
				iconsObj: {
					'125': 'iconfont icon-user',
					'103': 'iconfont icon-tijikongjian',
					'101': 'iconfont icon-shangpin',
					'102': 'iconfont icon-danju',
					'145': 'iconfont icon-baobiao'
					
				},
				//是否折叠
				isCollapse: false,
				//被激活的链接地址
				activePath: ''
			}
		},
		created() {
			this.getMenuList()
			this.activePath = window.sessionStorage.getItem('activePath')
		},
		methods: {
			logout() {
				window.sessionStorage.clear();
				this.$router.push('/login');
			},
			//获取所有菜单
			async getMenuList() {
				const {data: res} = await this.$http.get('menus');
				if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
				this.menulist = res.data;
			},
			//点击按钮，切换菜单的折叠与展开
			toggleCollapse() {
				this.isCollapse = !this.isCollapse;
			},
			//保存链接的激活状态
			saveNavState(activePath) {
				window.sessionStorage.setItem('activePath', activePath)
				this.activePath = activePath
			}
		}
	};
</script>

<style lang="less" scoped>
	.home-container {
		height: 100%;
	}

	.el-header {
		background-color: #373D41;
		display: flex;
		justify-content: space-between;
		padding-left: 0;
		align-items: center;
		color: #ffffff;
		font-size: 20px;

		>div {
			display: flex;
			align-items: center;

			span {
				margin-left: 15px;
			}
		}
	}

	.el-aside {
		background-color: #333744;
		.el-menu {
			border-right: none;
		}
	}

	.el-main {
		background-color: #EAEDF1;
	}
	
	.iconfont {
		margin-right: 10px;
	}
	.toggle-button {
		background-color: #4A5064;
		font-size: 10px;
		line-height: 24px;
		color: #FFFFFF;
		text-align: center;
		letter-spacing: 0.2em;
		cursor: pointer;
	}
</style>
